Undying Love is the squeal to Killer Love. Undying love picks up two months after Killer Love. If someone hasn't read the first book I would suggest they do. Due to many spoliers to a new reader. Killer Love starts off with a happy and deeply in love Charlie and Jax. Gemma is on cloud nine that she single handedly brought Charlie and Jax back together.

Killer Love is set a year after the horrible tragedy of Tara's death. Jax is still mourning the death of his wife and he's trying to figure how to be a single father while also being the President of SAMCRO. Jax still doesn't know who killed his wife. Despite everything that has been going on in the past year the moment that an old love interest is placed back into his life Jax knows it changes for the better. What will happen when Jax's first love decides to stay, will they rekindle an old flame or will Jax's fear of losing another woman that he loves get in the way?